Design, develop, fabricate, test, and demonstrate permissible low cost cylindrical stress gages and associated components capable of measuring change of stress as a function of time in underground coal mines. Open file report

Technical Report · Thu Nov 01 04:00:00 EST 1973

OSTI ID:7363992

Hawkes, I; Bailey, W V

A permissible, low cost, cyclindrical stress gage for use in measuring changing stress conditions in mine structures was designed, fabricated, and tested. The gage, which measures the changing vibrating characterisitcs of a pretensioned wire within an 1 1/2-inch integral unit installed in a borehole, was shown to be cheap, reliable, and very durable. Results of field testing in real mining situations show the gage to perform well, and indicate that the gage will be a valuable tool to those studying the change of structural stress changes related to failure of mine openings. Also, the gage will have use to mining companies engaged in monitoring the stability of areas suspect to failure. The gage is now available as an off-the-shelf item. (GRA)

• Research Organization: Creare, Inc., Hanover, N.H. (USA)
• OSTI ID: 7363992
• Report Number(s): PB-243374
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
016000 -- Coal
Lignite
& Peat-- Health & Safety
440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
BOREHOLES
CAVITIES
COAL DEPOSITS
COAL MINES
COAL MINING
COST
DESIGN
ENGINEERING
FABRICATION
FAILURES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MEASURING INSTRUMENTS
MINES
MINING
MONITORING
RESOURCES
SAFETY ENGINEERING
STRAIN GAGES
STRESSES